KR101593718B1 - Methods, test systems and arrangements for verifying compliance with requirement specifications - Google Patents

Abstract

A method is provided for verifying compliance with one or more requirements specifications. The method comprising the steps of: establishing a link between a test system and a communication device, said establishing comprising configuring one or more bearers and one or more control channels; CLAIMS What is claimed is: 1. A method comprising: closing a test loop comprising a test system and a communication device, the closing comprising activating a test loop function of the communication device; Transmitting data from the test system to the communication device on the downlink of the test loop; Receiving data at a communication device; Transmitting at least a portion of at least a portion of data to an uplink transmission device of the communication device after a specific event occurs; And in a test system, verifying that the link reset procedure is performed correctly by the communication device. Corresponding test systems and test loop functional devices are also disclosed.

Description

METHODS, TEST SYSTEMS AND ARRANGEMENTS FOR VERIFYING COMPLIANCE WITH REQUIREMENT SPECIFICATIONS, AND METHODS FOR TESTING COMPLIANCE WITH REQUIREMENTS SPECIFICATIONS

The present invention generally relates to the field of verifying compliance with requirements specifications. In particular, the invention relates to verifying compliance with the requirements specifications for uplink transmission and / or downlink reception of a communication device.

During the development of standardization for communication technologies, requirements specifications are often provided. The requirements specifications support requirements testing of communication devices and are developed for use in such conformance testing. Requirements The purpose of testing is to demonstrate that the communication device meets the relevant communication standards shown by demonstrating the fulfillment of the requirements specifications. The various requirements (or test) specifications cover different aspects of the relevant standard, such as, for example, control signaling aspects, accurate data transmission, and compliance with performance within certain limitations under certain conditions.

A common method of performing the requirements testing of communication devices is to connect the communication device to a test tool (test system) and have the test system initiate different aspects of the communication device function. The test system then verifies that the communication device performs its task in accordance with the requirements specifications.

A common prerequisite for enabling test automation and achieving repeatability of test results when terminal communication devices must undergo a requirement testing is that the terminal communication device includes certain specific test functions.

When testing certain aspects of the communication standard, mobile originated (MO) data transmission is required. Mobile station origination data refers to data to be transmitted from the terminal communication device to the communication network, such as data transmitted on the uplink (UL) of the radio link in UTRA (UMTS Terrestrial Radio Access). To enable testing of such scenarios, test functions in the terminal communication device need to trigger and generate MO data transmissions in the uplink (i.e., data transmission by the device under test).

To this end, certain test functions within the terminal communication device may include functionality adapted to the loopback data. For example, such functionality may be adapted to return data that has been transmitted by the test system to the terminal communication device by transmitting the same data back to the test system.

This technique of looping data back is typically performed using different communication technologies, such as UTRA-related mobile communications as specified in the 3GPP (Specification of conformance testing functions) < RTI ID = 0.0 > Are used to test the compliance associated with the.

Examples of relevant communication standards for embodiments of the present invention are General Packet Radio Service (GPRS), Universal Mobile Telecommunication Standard (UMTS) and UMTS (Long Term Evolution). Next, the existing requirements testing method and the description of the problems occurring in connection with the devices and their solutions according to embodiments of the present invention will be described with emphasis on UMTS LTE. However, the present invention is by no means limited to these communication standards, and is equally applicable to request testing related to other communications as will be readily understood by those skilled in the art.

It should be noted that all references to 3GPP specifications should be understood to refer to variations of the specifications as disclosed on the 3GPP website on May 6, 2008.

The 3GPP standard for UMTS LTE specifies how a terminal communication device should operate when it has pending data to transmit on the uplink. In order to verify such operations, certain test functions are required to trigger and generate data for transmission on the uplink. In TS 34.109 mentioned above, test functions are specified for UTRA to perform loopback of data received from the test system on the downlink (DL) so that data is returned on the uplink. In the test functions specified in TS 34.109, each data unit received on the downlink is returned directly on the uplink. In addition, these test functions are based on the fact that data units received on the downlink on a two-way radio bearer are transmitted directly on the uplink for transmission on the same radio bearer.

It is necessary to have means (e.g., from a test system) to control when the data transmitted on the downlink is allowed to be transmitted on the uplink in the terminal, so as to be able to verify terminal operation for certain scenarios. Such a scenario could be a connection reset after a radio link failure when the terminal has pending data for transmission on the uplink (e.g., R5-081618 (ftp://www.3gpp.org/tsg_ran/ 3GPP RAN5 work plan for TS 36.523-1; R5-081618 refers to TS 36.523-1, "Evolved Universal Terrestrial Radio Access (E-WG5_Test_ex-T1 / TSGR5_39_KansasCity / Tdoc / R5-081618.zip) UTRA) and Evolved Packet Core (EPC); User Equipment (UE) conformance specification; Part 1: Protocol conformance specification).

Similarly, it is also necessary to be able to verify the operation of a terminal communication device for a particular mobility scenario, for example, for handover between different radio access technologies (RATs) (e.g., See ㄲ 5-081618).

In order to be able to verify terminal operation for such scenarios, the test system needs to be able to control the timing between the specific events and operations in the test procedure.

3GPP specification TS 23.401, "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access" and TS 24.301, "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 "maps the SDF (Service Data Flows) to the EPS-bearers in order to achieve the required QoS (Quality of Service) based on the ULFTEL (Uplink Traffic Flow Template) It should be noted that the UL TFT is also an example of packet filtering, which is a more general term applicable to other communication standards. The UL TFT may specify, for example, the service type (s), port number (s), etc. for the service data flows. A similar function of how uplink IP (Internet Protocol) packet flows map to the correct bearer (for example, the correct Packet Data Protocol (PDP) context via UL TFT) is also described in TS 23.060 "General Packet Radio Service Service description; Stage 2 "and TS 24.008," Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ".

Test loops, such as those specified in TS 34.109, as described above, do not provide the loopback function necessary to verify correct UL TFT processing by the terminal device. Therefore, a means for testing the correct operation of the terminal with respect to the UL TFT function is needed. It is necessary to test the handling of UL TFTs within the same radio access technology. For example, EPD-bearers or PDP-contexts are released or modified while new EPS-bearers or PDP-contexts are activated or terminals remain in one and the same RAT. It is also necessary to test the handling of the UL TFT when the terminal experiences handover between the radio access technologies. For example, after E-UTRA versus UTRA handover, EPS-bearers are replaced by PDP contexts. Therefore, the precise handling of this situation with respect to the UL TFT needs to be verified.

Therefore, there is a need for methods, devices and test systems that enable requirements testing of scenarios in which the timing relationship between specific events and actions in the test procedure needs to be controlled. In addition, there are a need for methods, devices and test systems that enable requirements testing of scenarios in which packet filtering is applied.

The term " comprises / comprising "when used in this specification is taken to designate the presence of stated integers, steps, or components, but is not intended to exclude the presence or addition of one or more other features, integers, It should be emphasized that the presence or addition of groups is not excluded.

It is an object of the present invention to provide improved methods, test systems, and devices for eliminating at least some of the disadvantages described above and for verifying compliance with the requirements specifications.

According to a first aspect of the present invention, this is achieved by a method for verifying compliance with one or more requisite specifications of a communication device. The method comprising: establishing a link between the test system and the communication device, the configuring step comprising configuring one or more bearers and one or more control channels; establishing a link; Closing a test loop comprising the test system and the communication device, wherein the closing comprises activating a test loop function of the communication device; closing the loop; Sending data from the test system to the communication device on the downlink of the test loop; Receiving the data at the communication device; Transmitting at least a portion of at least the data to an uplink transmission device of the communication device after a specific event occurs; And verifying, in the test system, transmission on the uplink (116) of the test loop from the communications device to the test system.

In some embodiments, verifying the transmission on the uplink includes verifying that data transmitted to the uplink transmission device is correctly transmitted on the uplink by the communication device.

In some embodiments, the particular event may be a predetermined amount of time elapsing from receipt of the data, transmission of a specific instruction from the test system to the communication device, and execution of at least one of the test system and the communication device It may be one or more of the registration of test operator actions.

In some embodiments, the particular event may be the disconnection of the link. In such embodiments, the method may further comprise, at the test system, verifying that the link reset procedure is performed correctly by the communication device.

In some embodiments, the method further comprises: disconnecting the link after transmitting the data on the downlink and before the specific event occurs; And in the test system, verifying that the link reset procedure is performed correctly by the communication device.

The link may be a wireless link and the bearers may be radio bearers in some embodiments.

The method may, in some embodiments, further comprise transmitting a paging handover command from the test system to the communication device after transmitting the data on the downlink and before the specified event occurs, Lt; / RTI > And verifying by the communication device that an in-system cell handover procedure is performed correctly.

The method may, in some embodiments, further comprise transmitting a radio access technology handover command from the test system to the communication device after transmitting the data on the downlink and before the specific event occurs, Simulating a handover event; And in the test system, verifying that the radio access technology handover procedure is performed correctly by the communication device.

In some embodiments, activating the test loop functionality may include sending an indicator that specifies a particular event from the test system to the communication device.

In some embodiments, establishing a link between the test system and the communication device further comprises configuring one or more uplink packet filters; Wherein transmitting the data at the downlink of the test loop from the test system to the communication device comprises transmitting units of data associated with different service data flows and at each unit of data, RTI ID = 0.0 > a < / RTI > service data flow associated with the service; Wherein verifying the transmission on the uplink comprises determining whether each unit of data on the correct bearer corresponding to a service data flow associated with each unit according to the one or more uplink packet filters is transmitted by the communication device . ≪ / RTI >

A second aspect of the present invention is a computer program product comprising a computer readable medium having a computer program containing program instructions therein for communicating with one or more requisite features of the communication device, The test system being loadable to a data processing unit of a test system connectable to the communication device to verify compliance, the test system comprising: at least a link between the test system and the communication device, Wherein the establishing comprises configuring one or more bearers and one or more control channels; establishing a link; Closing a test loop comprising the test system and the communication device, wherein the closing comprises activating a test loop function of the communication device; closing the loop; Transmitting data from the system to the communication device on the downlink of the test loop; And verifying the transmission on the uplink of the test loop from the communication device to the test system. Wherein activating the test loop function further comprises transmitting an indicator from the test system defining a particular event to the communication device, wherein the particular event causes the communication device to send at least a portion of the data to the communication device To the uplink transmission apparatus.

A third aspect of the present invention is a computer program product including a computer readable medium having a computer program containing program instructions therein, the computer program being loadable to a data processing unit of a communication device And when the computer program is executed by the data processing unit, causing the test loop function of the computer device to: at least: receive an indicator specifying a particular event from the test system as part of activation of the test loop function of the communication device ; Receiving data from the test system on the downlink of the test loop; And transmitting at least a portion of the data to an uplink transmission device of the communication device after the specific event has occurred.

A fourth aspect of the present invention is a test system connectable to a communication device and for verifying compliance with one or more requisite features of the communication device. The test system includes a transmitter, a receiver, and processing circuitry. The processing circuitry comprising: establishing, via the transmitter, a link between the test system and the communication device; And through the transmitter and the receiver, to close a test loop comprising the test system and the communications device, the configuration comprising one or more bearers and one or more control channels, Activate the test loop function. Wherein the transmitter is adapted to transmit data from the test system to the communication device on a downlink of the test loop and the receiver and the processing circuitry are adapted to transmit from the communication device to the test system on the uplink of the test loop And is adapted to verify. Wherein the processing circuitry is also adapted to transmit, via the transmitter, an indicator that defines a particular event from the test system to the communication device as part of activation of the test loop, When transmitting at least a part to an uplink transmission apparatus of the communication device.

A fifth aspect of the present invention is a test loop functional device for integration into a communication device. The apparatus comprises a test control function unit; And a loopback functional unit adapted to receive data transmitted from a test system on the downlink of the test loop and to transmit at least a portion of the data to an uplink transmission device of the communication device. The test control function unit comprising: an indicator for specifying a specific event from the test system as part of activation of the test loop functional device; And to delay transmission of the data to the uplink transmission apparatus by the loopback functional unit until after the specific event occurs.

A sixth aspect of the present invention is a communication device including a test loop functional device according to the fifth aspect.

A seventh aspect of the present invention is an apparatus for verifying requirements specifications including at least a test system different from the fourth aspect and a communication device according to the sixth aspect.

In some embodiments, the second through seventh aspects of the present invention may additionally have the same or corresponding features as one of the various features as described above with respect to the first aspect of the present invention.

The test loop referred to in the present application includes a test loop of a communication device. The communication device is the object to be tested. The test loop further includes a test system adapted to automate testing of the communication device.

An advantage of some embodiments of the present invention is that requirements testing of scenarios in which the timing relationship between specific events and operations in a test procedure need to be controlled becomes possible.

Another advantage of some embodiments of the present invention is that it becomes possible to verify the terminal communication device compliance with MO data transmission in connection with the scenario.

Another advantage of some embodiments of the present invention is that scenarios in which communication re-establishment must be done for reasons that data is pending for communication at the terminal can be tested.

Another advantage of some embodiments of the present invention is that requirements testing of scenarios in which packet filtering is applied is enabled.

Another advantage of some embodiments of the present invention is that scenarios in which inter-system handover occurs can be tested.

Additional objects, features and advantages of the present invention will become apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which:
1 is a signaling flow diagram illustrating exemplary method steps in accordance with some embodiments of the present invention;
2 is a block diagram illustrating a test system and an exemplary device included in a communication device in accordance with some embodiments of the present invention;
3 is a block diagram illustrating an exemplary test system and an exemplary device included in a communication device in accordance with some embodiments of the present invention;
4 is a signaling flow diagram illustrating exemplary method steps in accordance with some embodiments of the present invention; And
5 is a block diagram illustrating exemplary IPv4 header fields.

In the following, embodiments of the present invention will be described, and in these embodiments methods and apparatus suitable for use in testing compliance with one or more requisite specifications are described.

As described above, the test functions specified in TS 34.109 do not allow any control of the triggering or timing of data transmission in the uplink. On the contrary, each data unit received on the downlink can be directly returned by the test function of the terminal communication device to transmit on the uplink. Moreover, data units received on the downlink on the bi-directional radio bearer are directly transmitted for transmission on the uplink on the same radio bearer. As specified in TS 34.109, the timing aspects for the loopback of data are limited to the terminal having to maintain the loopback delay constant within certain conditions. The loopback delay can not be controlled by the test system, but is simply specified as the maximum delay value.

In order to be able to verify terminal operation for certain scenarios, it is necessary to have means to control (from a test system, for example) how data transmitted on the downlink will be available for transmission on the uplink at the terminal. Such a scenario could be to reset the connection after the terminal has pending data for transmission on the uplink, after the wireless link connection is released (e.g., due to a radio link failure). Another exemplary scenario is that data is pending after handover to another radio access technology or to another cell in the same radio access technology.

To verify correct operation in such scenarios, it is important to be able to control the timing relationship between the disconnection of the link (or handover) and the triggering of data transmission on the uplink.

In the case of a radio access technology (RAT) handover, it is important to be able to verify the continuity of data transmission before and after RAT handover. Therefore, a test loop that can be maintained throughout the RAT handover must be provided, i.e., the test loop should not be canceled due to radio access system changes. This requires a wireless access transparent test loop mode.

1 is a signaling flow diagram illustrating interactions between a test system 100 and a communications device 110 under an exemplary method and test according to some embodiments of the present invention.

The test system 100 is configured to transmit data on the downlink to the communications device 110 and the communications device 110 is configured to return data received on the downlink for transmission to the test system 100 on the uplink . The communication device 110 is further configured to recover the data for transmission on the uplink only after a specific event has occurred. This enables control over the relative timing of specific events and operations in the test procedure. For example, the test system may ensure that the communication device has pending data for transmission when the link is disconnected by triggering the disconnection of the link before a specific event occurs. This allows the test system to verify the connection reset procedure and ensure that the data is correctly transmitted after a connection reset.

In step 101, the test system establishes a radio link and configures the radio bearer (s) and control channel (s) to be used for testing.

In step 102, the test system triggers the activation of the dedicated test loop function of the communication device, which responds to activation triggering in step 111. Activation at steps 102 and 111 may include the closure of the test loop. Activation may also include configuring the test loop function. Alternatively, the test loop function may be pre-configured in part or in whole.

In step 103, the test system sends data (e.g., IP packets or Layer 2 data units) on the downlink to the communications device, which receives the data in step 112. In step 112, the data received by the communication device also undergoes various processing by the communication device, e.g., internal device receive data processing, as is known in the art. After step 112 (e.g., with respect to steps 116 and 107), verification may be undertaken that the reception of data and the processing of the received data are performed correctly by the communication device.

The dedicated test loop function is configured to transmit all or a portion of the data received on the downlink for transmission on the radio bearer in the uplink (step 114). However, the dedicated test loop function is further configured to transmit data only for transmission on the uplink after a specific event has occurred (step 113).

The specific event may be the elapsed time of a certain time period from the time the data was received. This can be recognized as a timer in the test loop function. The time may be preconfigured or it may be configured (e.g., by a test system) as part of activation in steps 102 and 111. This may also be configured by specific instructions being entered at one or both of the test system and the communication device before or after the test function is activated in steps 102 and 111.

Certain events may also be associated with other events (step 105), such as the transmission of a particular instruction from the test system to the communication device, operations (such as pressing a key) performed by one or both of the test system Can be registered. The specific event may also be the disconnect (104) of the radio link established in step 101.

The type of event (elapsed time, command, operator action, link disconnect, etc.) may be preconfigured or may be configured (e.g., by a test system) as part of steps 102 and 111. The test system must send an indicator to the communications system, which defines the type of event and / or the amount of time elapsed. It may also be configured by specific instructions that are input to one or both of the test system and the communication device before or after the test function is activated in steps 102 and 111.

The solution with a specific elapsed time has little effect on the implementation of the communication device.

After the communication device transmits data for transmission on the uplink in step 114, the same data is transmitted on the uplink in step 116 and received by the test system in step 107. When the test system receives data at step 107, it is possible to verify the data. The verification may involve simply verifying that the uplink transmission has occurred, but may not include verifying that the data is actually correct, or it may involve verifying that the data is correctly transmitted on the uplink .

As discussed above, verification may additionally or alternatively indirectly include verifying correct reception and / or processing. The reason that such verification is indirect is because it is implemented through the verification-in-return (UL) data. The test system includes a recovered UL with data that was transmitted on the DL. If, for example, the returned UL data is the same as the data that was transmitted in the DL, this may be a verification that the reception and transmission of the DL data has been performed correctly. Another example is that the test system sends DL data with incorrect header information. Then, the communication device should not allow data and the correct operation of the communication device may be verified that no data has been returned in the UL.

When the test session is completed, the test system triggers deactivation (opening) of the test loop at step 108, and the communication device responds to the deactivation triggering at step 117. In step 109, the radio link is disconnected.

Before a particular event occurs, the test system may trigger the disconnection of the wireless link between the test system and the communication device under test at step 104. [

Test Loop Function in a Communication Device When returning data received on the downlink for transmission on the uplink, the radio link can thus be disconnected. Since the communication device is disconnected and has pending data for transmission on the uplink, a procedure for resetting the connection is triggered in step 115. [

In step 106, the test system verifies that the communication device correctly performs the connection reset procedure.

In step 104, the connection simulates a radio link failure, for example. Alternatively or additionally, the test system simulates a handover to a cell or other RAT in another system before a specific event occurs and verifies that the communication device correctly executes the corresponding procedures. In this case, the particular event may include any instance as described above or may include a handover within itself.

As described above, the loop function in the communication device can be configured to return some or all of the data received on the downlink. For example, a portion of the data transmitted on the downlink may be intended for uplink (e.g., to test uplink operation) and thus be recovered, while some of the data transmitted on the downlink may be partially It may be for the purpose and will not be returned. Moreover, when data is transmitted in packets (e.g., IP packets) on the downlink, it may simply be the payload of the packet that is returned for transmission on the uplink. Other content of the packet (such as header information) is removed, added, and transmitted on the uplink after being modified. The size of the payload may also be changed by, for example, repeating all or part of the payload, by truncating or puncturing the payload. Moreover, the size of the entire packet can be changed, for example, if the header is changed and / or the size of the payload is changed.

As described above, the test loop function may be ejectively configured in part or in whole. Each relevant scenario may have dedicated preconfigured test loop functionality. Alternatively, it may be a single (or multiple) test loop functionality that is configured as part of activation for a particular scenario in steps 102 and 111.

Although the links or bearers are described above as wireless links and radio bearers, embodiments of the present invention are equally applicable to wired communication systems.

Some embodiments of the present invention combine elapsed time and other event triggers in the same solution. For example, the data may be sent directly at step 114 after the event trigger 105 but at the latest after a certain period of time.

In TS 34.109 (Figure 5.1.1), a UE test loop function is provided that provides loopback of data for bi-directional radio bearers.

2 is a block diagram illustrating an exemplary test system 200 and an exemplary test loop functional device 310 included in a communication device 300 in accordance with some embodiments of the present invention.

The test system 200 and the communication system 300 may correspond to, for example, the test system 100 and the communication device 110 and the test system 200 and the device 310 may correspond to the test system 100 and the communication device 300, Method of the present invention.

The test system includes a transmitter 201, a receiver 202 and a processing circuitry (e.g., a central processing unit-CPU) These entities may be adapted to execute the method steps as described in connection with the test system 100 of FIG.

The test loop functional device 310 includes a test control unit (TC) 311 and a loopback (LB) functional unit 312.

According to embodiments of the present invention, the LB functional unit 312 may include one or more radio bearer loopback (RB LB) entities (not shown). In TS 34.109 (Figure 5.1.1), the loopback functional unit is shown with multiple radio bearer loopback (RB LB) entities (one per DL / UL RB pair). Each RBLB entity may be configured to return all or a portion of the data received from one downlink radio bearer (or control channel) to the uplink radio bearer. Alternatively, the RBLB entity may be configured to return all or a portion of the data received from any other link radio bearer (or control channel) to one of the configured uplink radio bearers, possibly based on some mapping rules .

The TC functional unit 311 is used to control the LB functional unit 312. The TC functional unit is operable, via the user interface of the communication device 300, via messages received at an interface external to the communication device 300, or via a wireless interface (e. G., An E-UTRA air interface) Lt; / RTI > The latter advantage is that no external interface needs to be delegated to all devices to be tested. For example, a built-in PC module according to the UTRA / E-UTRA specification does not need to have an additional external interface (e.g., USB) to fit immediately when the method is used. The TC functional unit provides control over the setup and configuration of the RB LB entities, the closing and opening of the test loop, and the event / time delay configuration for the activation and deactivation of the test loop function. The LB functional unit is adapted to receive downlink data and to transmit a portion of the data for transmission on the uplink. The transmission of data can be executed under the control of the TC functional unit.

The loopback point is beyond the access function of the communication device, i. E., In the non-access layer.

The test system 200 and communication device 300 may further include input / output interfaces as generally known in the art. These interfaces may include, for example, keys and display (s) and may be used by the test operator in performing, controlling, and monitoring the test.

3 is a block diagram illustrating an exemplary test system 220 and an exemplary test loop functional device 330 included in communication device 320 in accordance with some embodiments of the present invention.

The test system 220 and the communication device 320 may correspond to the test system 400 and the communication device 410 of Figure 4 and the test system 220 and the device 330 may correspond to the description May be adapted to perform the method steps as described above.

The test system includes a transmitter 221, a receiver 222 and a processing circuitry (e.g., central processing unit-CPU) These entities may be adapted to execute the method steps described with respect to the test system 400 of FIG.

The test loop function device 330 may be included in the communication device 320 and may therefore be coupled to a test control unit (TC) 331 and a loopback (LB) functional unit (not shown) similar to the corresponding units 311 and 312 in FIG. 332). The communication device 320 further includes a bearer mapping unit 333. The bearer mapping unit 333 may be configured such that the map data is transmitted to its respective bearers in accordance with corresponding packet filters in the uplink. Packet filters specify which bearer the data associated with a particular service data flow is mapped. The packets may be configured via Layer 3 control messages, for example, specified by the wireless or wired interface under test by the test system. For example, in the case of UTRA, E-UTRA, and GPRS, packet filters may be configured by UL TFT information transmitted in layer 3 control messages.

When the bearer mapping unit 333 is used, one or more radio bearer loopback (RB LB) entities are not needed in the LB functional unit 332. In such an implementation, all DL loopback data is transmitted in the UE LB function 332 and all UL loopback data is directly dedicated to the bearer mapping unit 333, which handles the additional distribution to the correct radio bearer.

The loopback function is beyond the access function of the communication device, i. E. In the non-access layer. This enables loopback functionality testing of the bearer mapping, for example after a link disconnect or handover event. Therefore, the loopback point goes beyond handling the mapping between the SDF (s) (or PDP content) at the communication device and the bearer (s).

In the situation where one or more SDFs (or PDP contexts) are set, there is typically one bearer that is not associated with any packet filter. Therefore, all packets must be transmitted on this bearer because they are not filtered and filtered by one of the packet filters. However, not explicitly associated with any packet may also be considered a packet filter (e.g., a complement of combinations of packet filters associated with different bearers). Therefore, it should be understood that this application refers to units of data associated with different service data flows, and each of the units of data includes information indicative of a service data flow associated with a unit of data, It is understood that verifying that the data is transmitted on the correct bearer corresponding to the service data flow associated with each unit of data in accordance with the present invention may also include the situation of one bearer not associated with any packet filter as described above do.

The LB functional unit may include the capability to change some of the header fields of the received IP packets before sending the IP packet received on the uplink. This may include inserting the IP checksum into the header after computing the IP checksum. Figure 5 shows IPv4 header fields. As an example, if the IP packet increases or decreases in size as described above, the IP header fields "total length" and "header checksum" are updated.

4 is a signaling flow diagram illustrating exemplary method steps and interactions between a test system 400 and a communications device 410 under test in accordance with some embodiments of the present invention.

The test method shown in Figure 4 is particularly useful for logging in communication devices that are associated with packet filters in wireless access technology and / or after RAT handover (e.g., as configured by a TFT when a wireless link is established) Suitable.

The test system 400 is configured to transmit data on the downlink to the communications device 410 and the communications device 410 is configured to return the data on the downlink to the test system 400 for transmission on the uplink .

In step 401, the test system configures the wireless links and configures the radio bearer (s), control channel (s), and packet filter (s) for testing.

In step 402, the test system triggers the activation of the dedicated test loop function of the communication device, and the communication device responds to the active trigger in step 411. The activity at steps 402 and 411 may include the closure of the test loop. The activity also includes configuring the test loop function. Alternatively, the test loop function may be pre-configured, either partially or totally.

In step 403, the test system sends data (e.g., IP packets) on the downlink to the communications device, which receives the data in step 412. The data received by the communication device may also be subjected to various processing by the communication device, e.g., internal device receive data processing, as is known in the art. Each packet transmitted on the downlink includes header information that simulates IP packets representing different service data flows. It may be taken after step 412 to verify that the reception of data (e.g., in connection with steps 416 and 407) and the processing of the received data is performed correctly by the communication device.

The dedicated test loop function is configured to transmit some or all of the data received on the downlink for transmission on the radio bearer in the uplink (step 414). When the data is returned for transmission on the uplink, the communication device maps IP packets to different bearers based on the packet filter configuration.

After the communication device transmits data for transmission on the uplink in step 414, the same data is transmitted on the uplink in step 416 and received in the receiver by the test system in step 407. When the test system receives the data in step 407, it can verify the data. Verification may involve simply generating uplink transmissions but not verifying that the data is actually correct, or it may also include verifying that the data is correctly transmitted on the uplink. The verification in step 407 may include verifying that the packet is sent in the correct uplink bearer according to the IP header information set by the test system and the packet filter configuration.

As discussed above, verification may additionally or alternatively include accurate verification of correct DL reception and / or processing. The test system contains the returned UL data with the data that was transmitted in the DL. For example, if the returned UL data is the same as the data that was transmitted in the DL, this may be a verification that the reception and processing of the DL has been performed correctly. Another example is that the test system sends a DL deleter with incorrect header information. At this time, the communication device should not approve the data, and the correct operation of the communication device can be verified since the data has not been returned from the UL.

When the test session is completed, the test system triggers inactivation (open) of the test loop in step 408, and the communication device responds to the deactivation trigger in step 417. In step 409, the radio link is disconnected.

The communication device 410 may further be configured to return data for transmission on the uplink only after a specific event has occurred. This makes it possible to control the relative timing of specific events and operations in test procedures. For example, the test system can trigger the disconnection of the link before a specific event occurs to ensure that the communication device has data pending for transmission when the link is disconnected. This allows the test system to ensure the possibility of verifying the connection reset procedure and the data is transmitted correctly after connection reset.

Therefore, the dedicated test loop function may also optionally be configured to transmit all or a portion of the data received on the downlink (step 414) for transmission on the radio bearer in the uplink only after a specific event has occurred (step 413) .

The specific event may be an elapsed time of a specific time period from the time the data was received. This can be realized as a timer in the test loop. The time may be pre-configured or may be configured as part of activation (e.g., by a test system) in steps 402 and 411. It may also be configured by a specific instruction being input to one or both of the test system and the communication device before or after the test function is activated in steps 402 and 411. [

Certain events may also be transmitted (step 405), from the test system to the communications device (step 405), the registration of operations (e.g., key presses) performed by the test operator in one or both of the test system and the communication device Step 405). This particular event may also be the disconnection 404 of the radio link set in step 401. [

The type of event (elapsed time, command, operator action, link disconnect, etc.) may be preconfigured, or it may be configured (e.g., by a test system) in steps 402 and 411 and as part of activation. The test system may send to the communication system an indicator that specifies the type of event and the elapsed time period. This may also be configured by specific instructions that are input to one or both of the test system and the communication device before or after the test function is activated in steps 402 and 411. [

The solution to a particular result time has little effect on the implementation of the communication device.

Before a particular event occurs, the test system may trigger the disconnection of the wireless link between the test system and the communication device under test in step 404. Therefore, when the test loop function at the communication device has the returned data received on the downlink for transmission on the uplink, the wireless link can be disconnected. If the communication device is disconnected and has pending data for transmission on the uplink, the procedure for resetting the connection is triggered in step 415. [

At step 406, the test system verifies that the communication device performs the connection reset procedure correctly.

The disconnect at step 404 may simulate, for example, a radio link failure. Alternatively or additionally, the test system simulates a handover to a cell or other RAT in another system before a particular event occurs and verifies that the communication device correctly executes the corresponding procedures. In this case, the specific event may form one of the above-mentioned examples, or may include a handover within itself.

As described above, the test loop function at the communication device can be configured to return some or all of the data received on the downlink. For example, some of the data transmitted on the downlink may be re-directed by being uplink oriented (e.g., to test for uplink operation), while some of the data transmitted on the downlink may be re- (E. G., For testing of downlink reception). ≪ / RTI > Moreover, if data can be transmitted in packets (e.g., IP packets) on the downlink, it may simply be the payload of the packet that is returned for transmission on the uplink only. Other content of the packet (such as header information) may be removed, added, or changed in the transmission definition in the uplink. The size of the payload may also be changed, for example by repeating all or part of the payload, by truncating or puncturing the payload. Moreover, the size of the entire packet can be changed, for example, when the header is changed and / or the size of the payload is changed.

As described above, the test loop function can be pre-configured, in part or in whole. There may be a pre-configured test loop function dedicated to each relevant scenario. Alternatively, there may be single (or multiple) test loop functions, and such test loop functions are configured as part of activation in steps 402 and 411 for a particular scenario.

Although links and bearers have been described above as wireless links and radio bearers, embodiments of the present invention are equally applicable to wired communication systems.

Some embodiments of the present invention combine alternative alternatives of elapsed time and other event triggers in the same solution. For example, the data may be sent directly after the event trigger 405, but at a later time in the lapse of a certain time period, in step 414.

For example, if it is desired to verify the operation of the communication device for packet filtering after a radio access technology handover has occurred, the following steps may be added to the method.

The test system initiates a change in the radio access technology by sending a corresponding handover command to the communication device (step 404 '). Alternatively or additionally, the test system may simulate a handover to a cell in another system. The handover procedure is therefore answered by the communication device at step 415 '. The test verification verifies, at step 406 ', that the communication device correctly performs the handover procedure.

In step 403 ', the test system sends additional data (e.g., IP packets) on the downlink to the communication device, which receives additional data in step 412'. In step 412 ', the data received by the communication device also undergoes various processing by the communication device, e.g., internal device receive data processing, as is known in the art. Again, each packet transmitted on the downlink contains header information that simulates IP packets representing different service data flows.

The dedicated test loop function transmits all or a portion of the additional data for transmission on the radio bearer in the uplink (step 414 '). When the additional data is returned for transmission on the uplink, the communication device maps IP packets to different bearers based on the packet filter configuration.

After the communication device transmits the additional data for transmission on the uplink in step 414 ', the same additional data is transmitted on the uplink in step 416' and received by the test system in step 407 '. When the test system receives the additional data in step 407 ', it can verify the additional data. The verification may also include verifying that the uplink transmission only occurs but not verifying that the additional data is actually correct, or verifying that the additional data is correctly transmitted in the uplink. The verification at step 407 'verifies whether each of the IP packets of the additional data is transmitted on the correct uplink buffer according to the packet filter configuration and IP header information by the test system, i. E. That the bearer mapping is correct even after handover ≪ / RTI >

Embodiments of the present invention make it possible to verify a communication device that conforms to scenarios for mobile originated data. This is applicable, for example, to scenarios for connection re-establishment when the data is pending for transmission at the communication device. Verification of compliance to such scenarios is important to ensure compliance of communication devices with standardized behavior and to ensure the quality of service that end users expect.

Embodiments of the present invention make it possible to test data continuity during mobility cases such as, for example, RAT handover between E-UTRAN and E-UTRA, and cell handover.

Embodiments of the present invention may also be used to test packet filter (e.g. UE UL TFT) functions and data continuity during mobility cases such as, for example, RAT handover between E-UTRAN and E-UTRA and cell handover .

The above-described embodiments of the present invention and their equivalents may be realized in software or hardware or a combination thereof. These may include digital signal processors (DSPs), central processing units (CPUs), co-processor units, field programmable gate arrays (FPGAs) May be implemented by general-purpose circuits associated with or associated with a communication device, such as, for example, an available hardware, or by specialized circuits such as, for example, application-specific integrated circuits (ASICs). All such forms are contemplated as being within the scope of the present invention.

The present invention may be embodied in an electronic device containing circuitry / logic in accordance with one of the embodiments of the present invention or executing methods. The electronic device may be, for example, a portable or small mobile wireless communication device, a mobile wireless terminal, a mobile phone, a communicator, an electronic organizer, a spoke phone, a computer, a notebook, or a gaming device. Lt; / RTI >

According to some embodiments of the invention, the computer program product comprises a computer readable medium, such as, for example, a diskette or a CD-ROM. The computer readable medium may store therein a computer program containing program instructions. The computer program may be loaded into a data processing unit that may be included in, for example, a mobile terminal or test system. Once loaded into the data processing unit, the computer program may be stored in a memory associated with or integrated with the data processing unit. According to some embodiments, a computer program is loaded into a data processing unit and, when executed by the processing unit, causes the data processing unit to perform the steps of, for example, .

The present invention has been described herein with reference to various embodiments. However, those of ordinary skill in the art will recognize that many modifications are still within the scope of the present invention and are therefore to be construed as described. For example, the method embodiments described herein illustrate exemplary methods through method steps performed in a particular order. It will be appreciated, however, that the sequences of events occur in a different order and do not depart from the scope of the present invention . Moreover, some method steps may be performed concurrently, even though they are described as being executed in sequence.

In the same way, it should be noted that, in the description of the embodiments of the present invention, the separation of functional blocks into specific units is by no means limiting the invention. Conversely, these separations are merely examples. Although the functional blocks are described herein as one unit, they may be separated into two or more units. In the same manner, although functional blocks described herein are described as being capable of being implemented in more than one unit, they may be implemented as a single unit, and are not outside the scope of the present invention.

It should also be emphasized that the features of this embodiment can be combined with the features of other embodiments in various combinations of acts.

Therefore, the limitations of the described embodiments are merely for the purpose of illustration, and are in no way limiting. Rather, the scope of the present invention is defined by the appended claims rather than by the specification, and all variations that fall within the scope of the claims are intended to be embraced herein.

Claims (25)

A method for verifying compliance with one or more requisite specifications of a communication device, comprising:
Establishing a link between the test system and the communications device, the configuring comprising: configuring one or more bearers and one or more control channels; establishing (101) a link;
Closing a test loop comprising the test system and the communication device, the closing comprising activating a test loop function of the communication device (102, 111);
Transmitting (103) data from the test system to the communication device on the downlink of the test loop;
Receiving (112) the data at the communication device;
Disconnecting the link after sending the data on the downlink and before a specific event occurs (104);
Transmitting (114) at least a portion of at least the data to an uplink transmission device of the communication device after the occurrence of the specific event (113, 106); And
In the test system, verifying (106) whether a link reset procedure is performed correctly by the communication device (115); And
In the test system, verifying (107) the transmission on the uplink (116) of the test loop from the communication device to the test system. The method according to claim 1,
Wherein verifying the transmission on the uplink comprises verifying that data transmitted to the uplink transmission device is correctly transmitted on the uplink by the communication device. A method for verifying the compliance with the. 3. The method according to claim 1 or 2,
Wherein the particular event is a certain amount of time lapse from receipt of the data. ≪ Desc / Clms Page number 21 > 3. The method according to claim 1 or 2,
Wherein the particular event is a transmission (105) of a specific instruction from the test system to the communication device. 3. The method according to claim 1 or 2,
Wherein the specific event is a registration (105) of a test operator action performed on at least one of the test system and the communications device. 3. The method according to claim 1 or 2,
The link is a radio link and the bearers are radio bearers and the step of disconnecting the link further comprises simulating a cell handover event in the system by sending a cell handover command from the test system to the communication device Wherein the step of verifying the link reset procedure further comprises verifying that the in-system cell handover procedure is performed correctly by the communication device. How to verify. 3. The method according to claim 1 or 2,
Simulating a radio access technology handover event by sending a radio access technology handover command from the test system to the communication device, wherein the link is a radio link and the bearers are radio bearers; Wherein validating the link reset procedure further comprises verifying that the radio access technology handover procedure is performed correctly by the communication device. ≪ RTI ID = 0.0 > 11. < / RTI & A method for verifying the compliance of a device. 3. The method according to claim 1 or 2,
Wherein activating the test loop function comprises sending an indicator that specifies a particular event from the test system to the communication device. ≪ Desc / Clms Page number 19 > Way. 3. The method according to claim 1 or 2,
Wherein establishing a link between the test system and the communication device further comprises configuring one or more uplink packet filters;
Wherein transmitting data at the downlink of the test loop from the test system to the communication device comprises transmitting units of data associated with different service data flows and at each unit of data, Comprising the steps of: providing information representative of a service data flow associated with the unit,
Wherein verifying the transmission on the uplink comprises determining whether each unit of data on the correct bearer corresponding to a service data flow associated with each unit according to the one or more uplink packet filters is transmitted by the communication device And verifying the compliance of the communication device with one or more requisite specifications. A computer program storage medium comprising a computer readable medium,
The computer readable medium having a computer program containing program instructions therein for communicating with a data processing unit of a test system connectable to the communication device for verifying compliance with one or more requisite specifications of the communication device And when the computer program is executed by the data processing unit, cause the test system to:
Establishing a link between the test system and the communications device, the configuring comprising: configuring one or more bearers and one or more control channels; establishing a link;
Closing a test loop comprising the test system and the communication device, wherein the closing comprises activating a test loop function of the communication device; closing the loop;
Transmitting data from the system to the communication device on the downlink of the test loop;
Disconnecting the link after transmitting the data on the downlink and before a specific event occurs;
Verifying that the link reset procedure is performed correctly by the communication device; And
The method comprising: verifying transmission on the uplink of the test loop from the communication device to the test system,
Wherein activating the test loop function further comprises transmitting an indicator from the test system defining a particular event to the communication device, wherein the particular event causes the communication device to send at least a portion of the data to the communication device To the uplink transmission device. CLAIMS What is claimed is: 1. A test system connectable to a communications device and for verifying compliance with one or more of the requirements specifications of the communications device, comprising:
Transmitters 201 and 221, receivers 202 and 222, and processing circuitry elements 203 and 223;
The processing circuitry comprising:
Establishing, via the transmitter, a link between the test system and the communication device;
Through the transmitter and the receiver, to close a test loop comprising the test system and the communication device,
Wherein the setting comprises configuring one or more bearers and one or more control channels, the closure comprising activating a test loop function of the communication device
The transmitter being adapted to transmit data from the test system to the communication device on the downlink of the test loop;
The receiver and the processing circuitry being adapted to verify transmission from the communication device to the test system in an uplink of the test loop;
The processing circuitry may additionally comprise:
Transmitting, via the transmitter, an indicator specifying a particular event from the test system to the communication device as part of activation of the test loop, wherein the particular event causes the communication device to send at least a portion of the data to the communication device Transmitting an indicator for controlling when transmitting to an uplink transmission device;
Disconnect the link after the transmitter has sent data on the downlink and before the specific event occurs;
And to verify compliance with one or more of the requirements specifications of the communication device adapted to verify that the wireless link re-establishment is performed correctly by the communication device. 12. The method of claim 11,
Wherein the processing circuitry is further adapted to verify that the data is correctly transmitted by the communication device in the uplink. ≪ Desc / Clms Page number 20 > 13. The method according to claim 11 or 12,
Wherein the link is a radio link and the bearers are radio bearers, the processing circuitry comprising:
Simulate a cell handover event in the system by sending a cell handover command to the communication device after the transmitter has sent data on the uplink and before the specific event occurs;
Wherein the cell handover procedure is further adapted to verify that the in-system cell handover procedure is performed correctly by the communication device. 13. The method according to claim 11 or 12,
Wherein the link is a radio link and the bearers are radio bearers, the processing circuitry comprising:
Simulate a radio access technology handover command by sending a radio access technology handover command to the communication device after the transmitter has transmitted data on the uplink and before the specific event occurs;
Wherein the wireless access technology handover procedure is further adapted to verify that a radio access technology handover procedure is performed correctly by the communication device. 13. The method according to claim 11 or 12,
The data comprising units of data associated with different service data flows, the processing circuitry comprising:
Configure, via the transmitter, one or more uplink packet filters;
Each of the units of data including information indicative of the service data flow associated with a unit of the data;
Characterized in that each of the units of data is further adapted by the communication device to verify on the correct bearer corresponding to a service data flow associated with the unit of the respective data along the one or more uplink filters A test device for verifying compliance with one or more requisite specifications of the communication device. An apparatus for verifying requirements specifications comprising a test system (100, 200, 220) and a communications device (110, 300, 320) according to claims 11 or 12. delete delete delete delete delete delete delete delete delete

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